MENTAWAI ISLANDS, Indonesia – Rescuers searching islands ravaged by a tsunami off western Indonesia raised the death toll to 370 Thursday as more corpses were wrapped in body bags or buried by neighbors. Officials said hundreds of missing people may have been swept out to sea.

Elsewhere in Indonesia, the volcano that killed 33 people earlier this week began erupting again, though there were no reports of new injuries or damage. Mourners held a mass burial Thursday during a lull in Mount Merapi's rumblings.

The twin catastrophes struck within 24 hours in different corners of the seismically charged region, severely testing the nation's emergency response network.